<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>猜数字练习</title>
</head>
<body>
<input type="text" placeholder="请输入1-100之间的整数">
<input type="button" value="猜一猜" onclick="f()">
<h3>结果：<span></span></h3>

<script>
    //得到一个1-100之间的随机整数
    let x = parseInt(Math.random() * 100) + 1;
    console.log(x); //作弊显示出x的值
    //得到文本框
    let i = document.querySelector("input");
    //得到span
    let s = document.querySelector("span");
    let count = 0;

    function f() {
        count++;
        if (isNaN(i.value)) {
            s.innerText = "输入错误";
            return;
        }
        if (i.value > x) {
            s.innerText = "猜大了！";
        } else if (i.value < x) {
            s.innerText = "猜小了！";
        } else {
            s.innerText = "恭喜你第" + count + "次猜对了！";
        }
    }
</script>

</body>
</html>